From 74be8427431b4bbff4a6506f64fb30bb61e781a7 Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Mon, 22 Feb 2010 22:09:29 -0700 Subject: [PATCH] OMAP clock: add omap_clk_get_by_name() for use by OMAP hwmod core code MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The OMAP hwmod core code is intended to use SoC IP block description structures that are autogenerated from TI's OMAP hardware database. Currently the hwmod code uses clkdev device + connection addressing to identify clocks. This causes problems in the hwmod autogeneration process, since the TI hardware database doesn't use platform_device or clkdev addressing; it uses a single clock signal name string, which tends to bear some resemblance to what is used in the OMAP TRMs. This patch adds a non-exported function to the OMAP clock code, omap_clk_get_by_name(). A subsequent patch will convert the hwmod code to use this function. This function is for use only by core code, and practically, no other code outside the hwmod code should need it. Device driver code in the kernel must not use this function, which is why it is not exported. Drivers should use the appropriate clock alias provided by the clkdev data structures, so driver code can be completely SoC-independent. Signed-off-by: Paul Walmsley Cc: Benoît Cousson Cc: Kevin Hilman --- arch/arm/plat-omap/clock.c | 27 +++++++++++++++++++++++++ arch/arm/plat-omap/include/plat/clock.h | 1 + 2 files changed, 28 insertions(+) diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c index f244b172f9e1..6cc13e7fd897 100644 --- a/arch/arm/plat-omap/clock.c +++ b/arch/arm/plat-omap/clock.c @@ -313,6 +313,33 @@ void clk_enable_init_clocks(void) } } +/** + * omap_clk_get_by_name - locate OMAP struct clk by its name + * @name: name of the struct clk to locate + * + * Locate an OMAP struct clk by its name. Assumes that struct clk + * names are unique. Returns NULL if not found or a pointer to the + * struct clk if found. + */ +struct clk *omap_clk_get_by_name(const char *name) +{ + struct clk *c; + struct clk *ret = NULL; + + mutex_lock(&clocks_mutex); + + list_for_each_entry(c, &clocks, node) { + if (!strcmp(c->name, name)) { + ret = c; + break; + } + } + + mutex_unlock(&clocks_mutex); + + return ret; +} + /* * Low level helpers */ diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h index de078afc65df..9b4701f14984 100644 --- a/arch/arm/plat-omap/include/plat/clock.h +++ b/arch/arm/plat-omap/include/plat/clock.h @@ -182,6 +182,7 @@ unsigned long omap_fixed_divisor_recalc(struct clk *clk); extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table); extern void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table); #endif +extern struct clk *omap_clk_get_by_name(const char *name); extern const struct clkops clkops_null; -- GitLab